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51a727e90f
Ricardo has pointed out that under Solaris the cwd is set to '/'
during module load, while under Linux it is set to the callers cwd.
To handle this cleanly I've reworked the module *_init()/_exit()
macros so they call a *_setup()/_cleanup() function when any SPL
dependent module is loaded or unloaded. This gives us a chance to
perform any needed modification of the process, in this case changing
the cwd. It also handily provides a way to avoid creating wrapper
init()/exit() functions because the Solaris and Linux prototypes
differ slightly. All dependent modules should now call the spl
helper macros spl_module_{init,exit}() instead of the native linux
versions.
Unfortunately, it appears that under Linux there has been no consistent
API in the kernel to set the cwd in a module. Because of this I have
had to add more autoconf magic than I'd like. However, what I have
done is correct and has been tested on RHEL5, SLES11, FC11, and CHAOS
kernels.
In addition, I have change the rootdir type from a 'void *' to the
correct 'vnode_t *' type. And I've set rootdir to a non-NULL value.
36 lines
1.9 KiB
C
36 lines
1.9 KiB
C
#ifndef _SPL_MODULE_COMPAT_H
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#define _SPL_MODULE_COMPAT_H
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#include <linux/module.h>
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#define spl_module_init(init_fn) \
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static int \
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spl_##init_fn(void) \
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{ \
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int rc; \
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\
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spl_setup(); \
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rc = init_fn(); \
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\
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return rc; \
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} \
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\
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module_init(spl_##init_fn)
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#define spl_module_exit(exit_fn) \
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static void \
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spl_##exit_fn(void) \
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{ \
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int rc; \
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\
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rc = exit_fn(); \
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spl_cleanup(); \
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if (rc) \
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printk(KERN_ERR "SPL: Failure %d unloading " \
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"dependent module\n", rc); \
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} \
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\
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module_exit(spl_##exit_fn)
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#endif /* _SPL_MODULE_COMPAT_H */
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